Nursery Trees

Spiny witchhazel gall aphid photos on birch and witchhazel

Crapemrytle bark scale was first confirmed in Maryland in April 2020 by the Maryland Department of Agriculture. It was later found in Frederick and Carroll Counties. Monitor crape myrtles closely for this pest to limit the spread of the scale insect.

Potato leafhoppers (Empoasca fabae) are a problem in nurseries on trees such as maples, redbud, and goldenraintree.

Eastern tent caterpillar and moth photos

Photos of stages and damage of boxwood leafminer

Images of phenological indicator plants for pest predictive calendar

Photos for flowering plants

Growing degree days - getting them and how to use them

sign-up for University of Maryland Commercial Landscape and Nursery IPM alerts

Periodical cicadas emerge in different geographical areas and these emergence groups are labeled as 'Broods".